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C. H. NORTON.

MACHINE FOR FORMING ROLLS. APPLICATION FILED MAY28,1920.

Patented June 6, 1922.

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0 M v i E Rf N B UM R, n M 3 T Lo: Mfl T s A T w 7 W m 2 Z a Q M 8 I Z w M n .1 1 L 4 W 8 w %w W v m ITNESSES C. H. NORTON.

MACHINE FOR FORMING ROLLS.

APPLICATION FILED MAY 28, 1920.

1,419,073. v Pm nted un 6, 1922.

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INVENTOR Mar/es li/Vor/an.

WITNESSES UNITED STATES PATENT OFFICE CHARLES H. NORTON, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO NORTON COMPANY, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHU- SETTS.

MACHINE FOR FORMING ROLLS.

Application filed May 28,

To all whom it may concern Be it known that I, CHARLES H. NORTON, a citizen of the United States of America, residing at Worcester, in the county of lVorcester and State of Massachusetts, have invented certain new and useful. Improve ments inMachines for Forming Rolls, of which the following is a full, clear, and enact specification. 7

My invention relates to a machine tool, and more particularly to a device for crowning rolls and forming various cylindrical shapes. It is specifically adapted for use in connection with a grinding machine, such as is shown in my prior Patent No. 1,096,188 dated May 12, 1914, and entitled Apparatus for grinding roils.

In machines heretofore devised for crown ing rolls the roll is crowned by traversing the wheel support and the work support relatively, one of said supports or carriers being also movable transversely and guided in this movement to give the desired form to the work. Various guiding or forming means have been proposed, such as a pat tern templet, but these either require that the templet be removed and replaced by another whenever the machine is to be used for forming work of a different shape, or if adjustments are provided, they do not permit changing the shape of the curve, except to vary the height of the crown.

It is, therefore, an object of my invention to overcome such difficulties and to provide a forming attachment for machine tools which can be adjusted with great nicety at a plurality of points to obtain the form of Work desired, which is free from the effects of any vibration of the machine, and, by the use of which the substitution of different forming elements for. different forms of work is avoided, whereby a convex, concave, tapered, sinuous or other form can be given the work, as may be desired.

It is another object of my invention to provide a ready means for ascertaining the amount of flexing of the forming member, such means being incorporated as a part of the machine, and to employ efiicient means for holding the support being guided against the forming member.

It is a still further object of my invention to provide a simple device associated Specification of Letters Patent.

Patented June 6, 1922.

1920. Serial No. 384,877.

with the part on the movable support which bears against the forming member for removing foreign matter from the surface thereof, so that the support will be accurately guided.

With these and other objects in View, the invention consists in the features of construction and combination of elements which will be hereinafter more fully set forth, and the novel features thereof pointed out in the claims at the end of the specification.

Reference being had to the drawings in which like numerals indicate like parts:

Fig. 1 is a plan view, with the wheel slide removed, of a machine equipped with my novel forming attachment, parts being broken away;

Fig. 2 is an end elevation, with parts shown in section.

Fig. 3 is a cross section on the line 3-3 of Fig. 2;

Fig. 4 is an enlarged detail view of the means for holding the auxiliary slide against th forming bar; and

Fig. 5 is an enlarged detail view, parts being broken away or shown in section, of the means for measuring the displacement of the auxiliary slide relative to the table.

In the embodiment of my invention selected for illustration, I have shown my forming attachment as comprising a forming bar 10 mounted. on the support 11 which is independent of the machine base 12 and parallel thereto. The table 13 is mounted to traverse longitudinally of the base and is operated by a rack 14 and gearing 15 in the manner shown in the patent above referred to. Mounted to move transversely of the tabis 13 is the auxiliary slide 1.6, on which is supported the wheel slide 17. The wheel 22 is mounted rotatably on this slide 17 and driven by any suitable means, which may be the driving means disclosed in my patent. The wheel slide 17 is adapted to be moved relative to the auxiliary slide 16 by the usual worm 18 and half-nut 19, the worm being operated by a worm wheel 20 and worm 21, similar to those disclosed in my patent.

The slide 16, and hence the face of the wheel 22, are caused to follow the contour of the forming bar 10 by the following means. Extending outwardly from the slide 16 toward the forming bar 10, is a bracket 23 able means, such as. bolts 29, to the table 13.

These bell crank levers have relatively long weighted arms 82 normally extending substantially horizontally and short vertically extending arms 33. These-vertical" arms en-y 'a e sleevesfi solined to the ends'of a rod 3O rigidly secured to the bracket 23 I preferably cut away a portion of these sleeves to form projctionsdO engaged by'the arms33,

this construction making it possible to fur;

ther shorten the short arms of the bell cranks, whereby a more powerful leverageis obtained to hold the roller against the bar.

Integrally with the bracket 23, T form a housing 'enclosing the top andsides of the roller, and to the sides opposite thebarT secure brushes 36, only one of which-is shown (Fig. 1), for cleaning or scraping the bar of all foreign matter, so that the roller will not be" given-any. movement which is not in con formity with the. shape of the bar. f

The bar 10 is bowed or sprung tothe desired curvature by means of screws 37 provided with hand wheels 38; The ends of these screws are formed with heads 41, engaging a T -slot 4L2formedin the side of the bar opposite its bearing surface. The screws and hand wheels are mounted on slides 43 which canbe adjusted longitudinally of the support 11 by loosening the bolts 4.4, which have their lieads'engage a T-slot 45 on the support. The slides 43 are" slotted, as at 46, to allow transverse and rotational adjustment thereof, if desired. By these means the screws and hand wheel units can be moved toward or away from each other along the support and'also toward or away from the bar, as may be desired,.to give the bar the esired shape.

I provide a simple and reliable means in connection with my forming attachment for readily reading the amount of displacement of the bar relative to a normal position, which consists of a' known form of dial test indicator 4L7v mounted in a box 4:8 fastened to the table 18 as by means of screws 49. A brac et attached to the slide 16 and carry-- ing a spring pressed plunger 51' extends through a slot 52in the side of the box 48, the plunger being aligned with the movable stem 53 ofthe indicator to cooperate therewith. to" indicate the relative movement between the parts. The plunger is backedby a spring 545 to allow yielding in case of excessivemovement of" the slide and thus prevent" hreaking-of the indicator. A; hinged cover 55"" protects the indicator in the box 4: as consistin'gof an upwardly extended projection 58 on the bracket 28 carrying a horizontally adjustable screw 59. The inner end of this screw when it is moved inwardly is adaj'ited to bear against the i auinliary sllde 16 to'movc the saidslide and its connected roller away from the formingbar.

In the use of my device for crowning rolls, for example, I first make 'the'bar 1f) perfectly straight and parallel with the table ways and to accomplish this object it is merely necessary to move the roller successively opposite each of the bar adjusting screws 37 and adjusting the bar in each instance so that the reading on the indicator is, say, zero. Theroller is then hroughtto such a position that the grinding wheel is opposite the center of'the roll 57 being ground. If none of the bar adjusting screws happen to be opposite the roller, the nearest one is moved along its support to that position and clamped there. The screw is now moved by the hand wheel to flex the bar away from the table ways, until the required amount of crown read on the indicator. The bar adjusting screwson each side of this central screw are in like man ner adjusted until the required reading on the indicator is obtained. It'will be obvione that a very fine adjustment of the bar 'to the desired shape can be obtained and-that as the wheel slide is fed into the work, the roll will first be ground at the ends with the traverse of the table, but with each feed ing movement of thewheel slide, the grinding will extend further and further from the ends toward the center of the roll until finally when the desired crown is obtained, the wheel will be in grinding cont-act with the roll from one end to theother.

It will be obvious from the foregoing description that T have provided a formii'ig attachment for grinding machines, and more particularly for roll grinding machines, which is highly efficient in operation, easily and cheaply manufactured and readily adjusted for grinding work of different shapes or contours, whereby production is increased. and devices of this nature generally improved.

While I have described herein a specificv embo'dimentof my invention, I do not wish to be limited by theprecise constructionset forth, forit will be evident to-those skilled in the art that changes and modifications can be made therein without departing from the spirit and scope of my invention as set forth in the claims.

WVhat I claim as new and desire to so cure by Letters Patent is:

1. In a machine tool having work and tool carriers which are capable of relative translation and one of which is movable transversely, a flexible forming bar to guide said transversely movable carrier and means for flexing said barat any desired points intermediate its ends to give it a desired contour.

2, In a machine tool having a base carrying a longitudinally and transversely movable tool carrier, a rigid support separate from said base, a flexible forming bar mounted on said support and means for flexing said bar to give it a desired contour and means for guiding said carrier by contact with said forming bar.

3. In a grinding machine having a base carrying a longitudinally and transversely movable wheel support, a flexible forming bar supported adjacent the base, means on said transversely movable support adapted to bear against said forming bar, and weighted means to hold said first-named means against the forming bar.

l. In a grinding machine having a base carrying a longitudinally and transversely movable wheel support, a flexible forming bar arranged adjacent the base, means on said transversely movable support adapted to bear against said forming bar, and weighted means comprising a bell crank lever for holding said first-mentioned means against the forming bar.

5. A grinding machine having a base carrying a longitudinally movable table, a wheel carrier movable transversely of said table, means to move said carrier transversely comprising separated members engaged by said carrier, one of said members being rigid and the other member flexible, and means to adjust the distance between said members at any desired spaced points and to shape the flexible member.

In a machine tool having a work support and tool support which are capable of relative translation and, one of which is movable transversely, a flexible forming bar adapted to guide said transversely movable support, and longitudinally adjustable de vices for flexing said bar at a plurality of points intermediate its ends to give it a desired contour.

7. In a machine tool having a base carrying a longitudinally and transversely movable tool support, a flexible forming bar mounted adjacent the base, longitudinally and transversely movable screw devices for flexing said bar at any desired plurality of points intermediate its ends to give it the desired contour, and hand wheels for operating said screws.

8. In a grinding machine having a traversing table and a wheel slide movable transversely of said table, a flexible forming bar adapted to guide said transversely movable wheel support, and means interposed between said table and wheel support for indicating the position of the guide sun face of the bar relative to the table at any point.

9. In a grinding machine having a longitudinally traversable table and a wheel support movable transversely of said table, a flexible forming bar adapted to guide said transversely movable wheel support, and a dial indicator mounted on one of said relatively transversely movable parts and engaging the other for indicating the position of the guide surface of the bar relative to the table at any point.

10. In a grinding machine having a longi tudinally traversable table, a wheel support movable transversely of said table, a forming bar adapted to guide said transversely movable support, a dial indicator mounted on one of said relatively transversely movable parts and engaging the other for indicating the position of the guide surface of the bar relative to said table at any point, and yieldable means to prevent breaking of the indicator upon excessive movement between said slide and table.

11. In a forming attachment for machine tools, a forming bar, a support therefor, a plurality of adjustable means for flexing the bar and connecting it to the support, and means for fixedly adjusting said first-mentioned means at any desired point longitudinally along the support and bar.

12. In a forming attachment for machine tools, a forming bar, a support therefor, means for flexing said bar and connecting it to the support, said means being adjustable longitudinally and transversely of said support and bar.

13. In a grinding machine, a forming bar, a wheel carriage movable longitudinally and transversely of said bar and having a follower resting against said bar, and means associated with said follower for removing foreign matter from the surface of said bar against which the roller bears.

Signed at WVorcester, Massachusetts, this 26th day of May, 1920.

CHARLES H. NORTON. 

